Let us now define resonance. In a two-terminal electrical network containing at least one inductor and one capacitor, resonance is the condition which exists when the input impedance of the network is purely resistive

《电力系统自动化》课程教学资源（理论课程资料）自动并列_准同期自动并列装置的实现原理_一种新型微机自动准同期装置

《电力系统自动化》课程教学资源（理论课程资料）自动并列_准同期自动并列的分析_浅谈发电机的同期并列

Find the resonant frequency arallel resonance

A current i at Li produces an open circuit voltage u,at L2s dyal

An ideal transformer is a useful approximation of a very tightly coupled transformer in which the coefficient of coupling is almost unity and both the primary and secondary inductive reactance are extremely large in comparison with the terminating impedance

Frequency characteristics(Xi, xc,x,z, y, o vs o Z=R+A=R+(L+Xc)=R+ilo I

We assume=Im cos(t+a)i=Im cos(ot+B) The phase angle by which the voltage leads

Example 1: If 0=4v2 cos\tV, Z=2/600Q2 Find p(t)and P. Solution:

《电路》（英文版）9-1 Instantaneous power